Prefabricated composite steel tube concrete latticed column and construction method

Abstract

A prefabricated composite steel tube concrete latticed column is composed of prefabricated double-steel-tube interlayer concrete column limbs and lattice type connecting pieces between the column limbs. Steel tubes at the outer sides of the prefabricated column limbs are connected with the lattice type connecting pieces through bolts, and interlayer concrete between steel tubes at the inner sides and the outer sides of the column limbs is ultra-high-performance concrete. The upper-layer prefabricated column limbs and the lower-layer prefabricated column limbs are connected through flanges and connecting pipes. The double-steel-tube interlayer confined concrete can effectively reduce the steel distribution rate of column components, save the concrete consumption and reduce the self weight. The latticed column adopts a full-assembly manner, site construction is simple and convenient, and wet operation is not needed. A hollow part of the inner steel tube serves as strength reserve, and the purposes of crane upgrading and plant transformation in the using process can be achieved through secondary pouring of concrete in the hollow part. Based on the characteristics of simple and convenient design and flexible application, the latticed column can be widely applied to medium-sized industrial factory buildings, and the durability, the fire resistance and the anti-seismic property of the latticed column are effectively improved.

Description

Technical field [0001] The present invention belongs to the field of building technology, and in particular, the present invention relates to a prefabricated assembled composite steel pipe concrete column and construction method. Background technique [0002] In modern industrial plants in the production of electrical equipment, steel pipe concrete columns or steel pipe concrete columns with higher carrying capacity (crane tonnage often greater than 500T), and for intermediate tonnage cranes (100T-400T), The steel column or the grid steel column is generally often used as a gravity column and the main anti-side force member. Steel column sections are generally stable control, and the material strength cannot be fully utilized. If the method of reducing the length ratio of the component is used to solve the stability problem, it will cause excessive cross section, further increase the steel rate, and the cost is too high. If a steel pipe concrete strip having a good carrying capac...

AI Technical Summary

Problems solved by technology

The cross-section design of steel columns is generally controlled by stability, and the strength of the material cannot be fully utilized. If the method of reducing the slenderness ratio of the member is used to solve the stability problem, the cross-section will be too large, the steel ratio will be further increased, and the cost will be too high

If a concrete-filled steel tube lattice column with better bearing capacity is used, the calculated column limb section is usually less than 200mm, and the section size is at the lower limit of the specification, the concrete is difficult to pour, and the construction technology is difficult to guarantee

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